Incorrectly took money from my account

I recieved a SMS from Absa saying that if i do not provide proof of car insurance within 14 days,they are going to take R700 from my account.I sent them my proof of insurance within the time frame and i gave no permission for my account to be debited but they still went ahead and took the money.I sent them a mail and tried getting a hold of this department twice,i still havent recieved a response.